EP3206868B1 - Sheet for protecting a formwork surface, formwork installation, method of production and method of use - Google Patents

Sheet for protecting a formwork surface, formwork installation, method of production and method of use Download PDF

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Publication number
EP3206868B1
EP3206868B1 EP15783989.5A EP15783989A EP3206868B1 EP 3206868 B1 EP3206868 B1 EP 3206868B1 EP 15783989 A EP15783989 A EP 15783989A EP 3206868 B1 EP3206868 B1 EP 3206868B1
Authority
EP
European Patent Office
Prior art keywords
sheet
layer
formwork
concrete
additive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15783989.5A
Other languages
German (de)
French (fr)
Other versions
EP3206868A1 (en
EP3206868B8 (en
Inventor
Jérémy GUICHARD
Michael PLOTON
André CHALAVON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pro-T-Co
Original Assignee
Pro T Co
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Publication date
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Publication of EP3206868A1 publication Critical patent/EP3206868A1/en
Application granted granted Critical
Publication of EP3206868B1 publication Critical patent/EP3206868B1/en
Publication of EP3206868B8 publication Critical patent/EP3206868B8/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
    • E04G21/30—Safety or protective measures preventing damage to building parts or finishing work during construction against mechanical damage or dirt, e.g. guard covers of stairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0064—Moulds characterised by special surfaces for producing a desired surface of a moulded article, e.g. profiled or polished moulding surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • B28B7/364—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article of plastic material or rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G17/00—Connecting or other auxiliary members for forms, falsework structures, or shutterings
    • E04G17/002—Workplatforms, railings; Arrangements for pouring concrete, attached to the form
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G19/00—Auxiliary treatment of forms, e.g. dismantling; Cleaning devices
    • E04G19/003—Arrangements for stabilising the forms or for moving the forms from one place to another
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/10—Forming or shuttering elements for general use with additional peculiarities such as surface shaping, insulating or heating, permeability to water or air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/02—Synthetic macromolecular particles
    • B32B2264/0214—Particles made of materials belonging to B32B27/00
    • B32B2264/0221—Thermoplastic elastomer particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/105—Metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/712—Weather resistant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2571/00—Protective equipment

Definitions

  • the present invention relates to a sheet for protecting a formwork surface intended to frame a building material.
  • the invention also relates to a formwork installation equipped with at least one such sheet.
  • the invention also relates to a method of manufacturing and a method of implementing such a sheet.
  • the field of the invention is that of formwork equipment.
  • a formwork installation comprises a temporary enclosure provided for the shaping of a building material, such as concrete, reinforced or not.
  • a building material such as concrete, reinforced or not.
  • the material can be cement, plaster or adobe.
  • the concrete is poured and then kept in the enclosure during its setting and hardening.
  • the enclosure is delimited by forms provided with shuttering surfaces, generally in metal, wood or plywood, which are subjected to numerous constraints in service.
  • the shape and condition of the formwork surfaces define the final shape and condition of the concrete, after hardening and stripping.
  • the formwork surfaces are separated to release the concrete. If the concrete adheres to the formwork surfaces, its surface condition and even its integrity may be degraded. To facilitate formwork, it is therefore important that the formwork surfaces have as smooth a surface condition as possible, devoid of any roughness. However, the wear of the formwork surfaces increases over time. Thus, to further facilitate the formwork, it is known to coat the formwork surfaces with oil or formwork agent before pouring the concrete into the enclosure.
  • oils or form release agents are harmful to workers and pollute the soil in the vicinity of the construction site. Workers must be equipped with specific protections, such as a respiratory mask, goggles and a protective suit, which are not always used despite the corresponding risks and costs. Oil or form release agent should be applied between each formwork operation, which takes some time and requires special attention. If this step is carried out too quickly, oil or form release agent may leak to the ground, which is both a waste and a source of pollution for soils and groundwater. In addition, some parts of the shuttering surfaces may not be covered with oil or form release agent, and therefore adhere to the concrete.
  • GB 460 980 describes a formwork lining comprising at least one sheet of rubber, one of the surfaces of which is corrugated, rough or otherwise gives the surface of the concrete or other material with which it is used the desired contour, and which can be easily removed from the concrete without difficulty after use.
  • JPH 111 9913 A describes a sheet applied to a formwork surface which requires little cleaning effort and allows easy separation of the elements, comprising a front sheet made of a plastic or flexible rubber material, and a back sheet made with a magnetic rubber or magnetic plastic substance which magnetically attaches to a metal part of the formwork surface.
  • the front sheet is responsible for a very good surface condition for the cast concrete part.
  • the object of the present invention is to remedy the above drawbacks.
  • the subject of the invention is a sheet for protecting a formwork surface, intended to delimit a volume of concrete pouring and to frame a building material, characterized in that the sheet comprises at least: front layer, including at least one polymeric material and intended to be in contact with concrete in order to reduce wear and the formation of scratches on the formwork surface and to limit the adhesion of the concrete during formwork removal; and a rear adhesive layer, intended to be positioned against the formwork surface and to secure the sheet to the formwork surface, before the construction material is supplied.
  • the invention makes it possible to facilitate the formwork removal from the building material, while avoiding the use of harmful and polluting oils or formwork release agents.
  • the final surface condition of the material is improved. Workers no longer need restrictive protective equipment.
  • the site and surrounding soils are no longer polluted by oils or formwork agents.
  • the sheet can be quickly applied to the formwork surface.
  • the same sheet can be reused for several successive shuttering operations, for example five operations in succession, while remaining installed on the same shuttering surface, which saves time and therefore considerable money.
  • the same sheet resists contact with the building material for several days under site conditions (humidity, sunshine, abrasion, ).
  • a quick cleaning (light scraping with spatula, abrasive sponge or cloth) is enough to clean the sheet between two formwork operations, quickly and conveniently compared to a sequence of cleaning, scraping and oiling the formwork surface.
  • the invention makes it possible to avoid premature wear of the formwork, to improve its service life, and therefore to save money.
  • the sheet facilitates the flow of all types of concrete.
  • reinforced concrete construction the risk of accidentally applying oil or form release agent to metal reinforcement is eliminated.
  • several sheets can be used to fully cover the formwork surface.
  • the invention also relates to a formwork installation equipped with at least one sheet as mentioned above.
  • the installation can be vertical, in particular for making a wall, and include two shuttering surfaces arranged facing each other.
  • the installation is preferably equipped with at least two sheets arranged opposite and delimiting a formwork volume of the construction material.
  • the installation can be horizontal, in particular for making a floor or a ceiling, and include a single formwork surface arranged below the formwork volume.
  • it may include several sheets positioned on each formwork surface, delimiting the formwork volume.
  • the neighboring sheets can be connected together by strips of adhesive tape, or any other suitable means.
  • the front layer is made of plastic. If the sheet comprises several plastic layers, these layers can be produced simultaneously during step a1), in particular by multilayer extrusion.
  • the adhesive layer may consist of a double-sided adhesive film (preferably applied by lamination) or a volume of glue (preferably applied by coating).
  • step a2) is carried out after step a1).
  • the rear adhesive layer can be applied to the front plastic layer, or to another intermediate plastic layer, after the manufacture of the at least one plastic layer.
  • step a2) is carried out simultaneously with step a1).
  • the rear adhesive layer can be applied to the front plastic layer, or to another intermediate plastic layer, during the manufacture of the at least one plastic layer.
  • the adhesive layer can be applied in-line during extrusion.
  • FIG 1 shows the installation 1 devoid of protective sheets 10 according to the invention.
  • the figure 2 shows the installation 1 according to the invention, provided with protective sheets 10.
  • the installation 1 comprises two forms 2 arranged opposite, a handling gantry 3, protective barriers 4 and support struts 5.
  • the forms 2 are also called shuttering panels.
  • the forms 2 are provided with formwork surfaces 6, or formwork surfaces 6, arranged facing each other and delimiting a volume 8 of concrete pouring.
  • the gantry or compass 3 is provided to stabilize the formwork 2 during the formwork and allow their lifting vis-à-vis during the formwork.
  • the barriers 4 are arranged in the upper part of the forms 2, to avoid the accidental fall of an operator.
  • the struts 5 are arranged on the rear of the forms 2 to stiffen the assembly, in particular during the pouring of concrete into the volume 8.
  • the installation 1 may include other devices, not shown for the purpose of simplification.
  • the formwork surfaces 6 are provided with several protective sheets 10 according to the invention.
  • the sheets 10 are arranged side by side, with strips 16 of adhesive tape arranged between them. Together, the sheets 10 and the strips 16 form a protective cover 18 applied to the same surface 6.
  • the sheet 10 has a generally rectangular shape delimited by an upper edge 11, a lower edge 12, a left edge 13 and a right edge 14.
  • the strips 16 are positioned on the surface 6 to partially cover the right edge 14 of a first sheet 10 and the left edge 13 of a neighboring second sheet 10, so that the cover 18 completely covers the surface 6.
  • first, concrete could be introduced between the surface 6 and the sheet 10 during casting.
  • Second, the concrete could adhere to surface 6 during formwork removal.
  • the strips 16 can be formed by an adhesive adhesive film of acrylic polypropylene. According to a possible but not preferred variant, the sheets 10 can overlap without strips 16 interposed between them.
  • the sheet 10 has a height H10 defined vertically between its edges 11 and 12, a width L10 defined horizontally between its edges 13 and 14, and a thickness e10 defined horizontally between a front face 22 and a rear face 54.
  • the height H10 is of the order of 2800 mm (millimeters)
  • the width L10 is of the order of 625 mm
  • the thickness e10 of the sheet 10 is greater than 0.2 mm and less than 2 mm.
  • the thickness e10 can be less than 0.2 mm or more than 2 mm.
  • the strips 16 have a width L16, for example of the order of 38 mm.
  • the assembly has a width L18, for example of the order of 4000 mm, corresponding to the width of the formwork surface 3.
  • the sheet 10 is designed to effectively protect the formwork surface 6, intended to frame the building material.
  • the sheet 10 comprises different layers 20, 30, 40 and 50, which have respective thicknesses e20, e30, e40 and e50.
  • the layers 20, 30 and 40 are made from a polymer material, optionally comprising fillers, plasticizers and additives. In other words, the layers 20, 30 and 40 comprise at least one polymeric material. Preferably, the layers 20, 30 and 40 are made of plastic.
  • the layer 20 is the front layer or outer layer of the sheet 10.
  • the layers 30 and 40 are the intermediate layers of the sheet 10.
  • the layer 50 is the back layer or inner layer of the sheet 10, made of adhesive material.
  • the thicknesses e20, e30 and e40 are of the order of 0.27 mm, while the thickness e50 is of the order of 0.02 mm.
  • the layers 20, 30, 40 and 50 have different planar faces linked together.
  • the layer 20 has a front face 22 and a rear face 24.
  • the layer 30 has a front face 32 and a rear face 34.
  • the layer 40 has a front face 42 and a rear face 44.
  • the layer 50 has a front face 52 and a rear face 54.
  • the face 24 is secured to the face 32, the face 34 is secured to the face 42 and the face 44 is secured to the face 52.
  • the intimate connection between the layers 20, 30 and 40 is made during of their manufacture, while the connection between the layers 40 and 50 is carried out when the layer 50 is applied to the layer 40, in particular by lamination or coating.
  • the layers 20, 30 and 40 can be made of polypropylene, polyethylene, polystyrene, PVC, resin, composite of different polymers and / or other materials, plastic material of plant origin or any other material suitable for intended application.
  • the layers 20, 30 and 40 are produced together during the same extrusion operation.
  • the sheet 10 is produced in individual format, and not in the form of a cutting roll. The dimensions of the sheet 10 or of a series of sheets 10 can be easily adapted to the dimensions of the surface 6 to be protected.
  • the layer 20 is intended to be placed in contact with the building material, opposite the surface 6, during a formwork operation.
  • the front faces 22 of the different sheets 10 and those of the strips 16 border the concrete poured into the volume 8.
  • the layer 20 is designed to have a damping effect when the concrete is poured, in order to reduce wear and the formation of stripes on surface 6.
  • Layer 20 is also designed to limit the adhesion of concrete during formwork.
  • Layer 30 is a wear indicator layer, produced with a different color from layers 20 and 40, or at least different from layer 20.
  • Layer 30 provides a wear indicator function: after several uses of the sheet 10 , the front face 32 of the layer 30 appears when the layer 20 is worn or scratched. The wear of the sheet 10 can therefore be detected visually by the workers, after a certain number of uses, for example after four or five successive forms.
  • the control function of the layer 30 can be achieved by any means suitable for the intended application, other than a color difference.
  • the layer 40 is designed to facilitate the adhesion of the layer 50 to the face 44, for example by adding a specific additive and / or by texturing the face 44 using one or more textured metal rollers. In this case, the rollers press on the face 44 during the extrusion or after the extrusion.
  • the layers 30 and / or 40 can be designed to stiffen or slightly soften the sheet 10, depending on the choice of plastics and thicknesses e30 and e40.
  • the plastic layers can incorporate metallic pigments for improve the magnetic power of the magnets, when fitting form dummies or templates at the formwork installation.
  • the plastic layers preferably only the layer 20 and / or the layer 40
  • the plastic layers can comprise an additive for protection against UVs (ultraviolet), making it possible to improve the resistance of the sheet 10 to UVs, in particular during of its storage.
  • the plastic layers preferably only the layer 20
  • the plastic layers may include a stiffening additive, to control their hardness.
  • the plastic layers may include an additive to limit their deformation under the effect of temperature changes, in particular during formwork or during storage.
  • the plastic layers can comprise an antistatic additive.
  • the adhesive layer 50 is intended to be positioned against the surface 6, to secure the sheet 10 to the surface 6, before the construction material is brought into the volume 8 between the forms 2, during the shuttering operation. More specifically, the face 54 is provided to adhere to the surface 6.
  • the layer 50 can be presented as a film double-sided adhesive, or a volume of glue applied to layer 40 by coating.
  • the layer 50 is designed to remain attached to the layer 40 when the sheet 10 is detached from the surface 6. In other words, the face 52 remains attached to the face 44 when the face 54 is detached from the surface 6.
  • the layer 50 extends over the entire sheet 10, in other words over the entire face 44 of the layer 40.
  • the layer 50 extends partially over the sheet 10, in other words over only one part of the layer 40.
  • the layer 50 is applied to the layer 40 after the extrusion of the layers 20, 30 and 40.
  • the layer 50 can be applied in line during the extrusion operation.
  • the face 54 of the layer 50 can be covered with a protective film provided with a tongue.
  • each of the sheets 10 has a central hole 60, crossing between the faces 22 and 54.
  • the holes 60 are provided for the passage of holding keys, that is to say transverse pieces arranged in the volume 8 to support the formwork 2.
  • the holes 60 are preferably pre-drilled during the manufacture of the sheet 10. In a variant not shown, the same sheet 10 may have several holes 60.
  • the invention also relates to a method for manufacturing a sheet 10.
  • the method comprises a step a1) consisting in manufacturing the layers 20, 30 and 40, preferably by extrusion.
  • the method also includes a step a2) of applying layer 50 on layer 40 to form the sheet 10.
  • step a2) is carried out after step a1).
  • step a2) is carried out simultaneously with step a1).
  • the method can also include a step a3), consisting in marking the sheet 10 with a particular pattern, for example shapes, designs, trademarks, logos or any other graphic creation.
  • the pattern is marked on the layer 20, for example by passing the sheet 10 through a press or under a roller.
  • the pattern can be printed on the concrete surface during the formwork operation.
  • the subject of the invention is also a method of implementing a sheet 10.
  • the method comprises a step b1), consisting in positioning the layer 50 against the surface 6, so as to secure the sheet 10 and the surface 6, before pouring concrete.
  • the method then comprises a step b2), consisting in carrying out the formwork by pouring the concrete in contact with the layer 20.
  • the method also comprises a formwork removal step b3), carried out after step b2), consisting in removing the concrete having its final form.
  • the method may include a step b0), carried out before step b1), consisting in pre-drilling the through hole 60 and / or cutting the edges 11, 12, 13 and 14 of the sheet 10 according to the dimensions of the surface 6.
  • the method may also include a step b4), carried out between steps b1) and b2), consisting in positioning jointing strips 16 between adjacent sheets 10.
  • the process can also include other preparatory steps before the shuttering step b2), as well as other steps after steps b2) and b3).
  • the construction material used for the formwork can be concrete or any other material suitable for the intended application.
  • the formwork operation makes it possible to build walls, floors or any other type of element, for example barriers, pipes or concrete tiles.
  • the sheet 10 comprises a front plastic layer 20, a control layer 30 and an adhesive layer 50, but no intermediate plastic layer 40.
  • the adhesive layer 50 is applied to the control layer 30.
  • the sheet 10 comprises a plastic layer before 20 and an adhesive layer 50.
  • the adhesive layer 50 is applied to the plastic layer 20
  • the sheet 10 can be shaped differently from figures 2 to 6 without departing from the scope of the invention.
  • the sheet 10 may have different shapes and dimensions depending on the intended application.
  • the shuttering surfaces 6 are vertical and substantially planar.
  • a formwork surface can be horizontal or inclined.
  • a formwork surface can be concave or convex, and not planar.
  • the sheet 10 can be thermoformed to give it a particular configuration adapted to the intended application.
  • a wide variety of shapes of the building material can thus be obtained after formwork.
  • the sheet 10 comprises at least: a plastic layer before 20, including at least one polymeric material and intended to be in contact with the building material; and a rear adhesive layer 50, intended to be positioned against the formwork surface 6 and to secure the sheet 10 to the formwork surface 6, before the construction material is supplied.
  • the sheet 10 can be adapted in terms of cost and performance.

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Description

La présente invention concerne une feuille pour la protection d'une surface de coffrage destinée à encadrer un matériau de construction. L'invention concerne également une installation de coffrage équipée avec au moins une telle feuille. L'invention concerne également un procédé de fabrication et un procédé de mise en œuvre d'une telle feuille. Le domaine de l'invention est celui des équipements de coffrage.The present invention relates to a sheet for protecting a formwork surface intended to frame a building material. The invention also relates to a formwork installation equipped with at least one such sheet. The invention also relates to a method of manufacturing and a method of implementing such a sheet. The field of the invention is that of formwork equipment.

De manière connue, une installation de coffrage comprend une enceinte provisoire prévue pour la mise en forme d'un matériau de construction, tel que du béton, armé ou non. Selon d'autres exemples non limitatifs, le matériau peut être du ciment, du plâtre ou du pisé.In known manner, a formwork installation comprises a temporary enclosure provided for the shaping of a building material, such as concrete, reinforced or not. According to other nonlimiting examples, the material can be cement, plaster or adobe.

Lors de l'opération de coffrage, le béton est versé puis maintenu dans l'enceinte pendant sa prise et son durcissement. L'enceinte est délimitée par des banches pourvues de surfaces coffrantes, généralement en métal, bois ou contre-plaqué, qui sont soumises à de nombreuses contraintes en service. La forme et l'état de surface des surfaces coffrantes définissent la forme et l'état de surface finals du béton, après durcissement et décoffrage.During the formwork operation, the concrete is poured and then kept in the enclosure during its setting and hardening. The enclosure is delimited by forms provided with shuttering surfaces, generally in metal, wood or plywood, which are subjected to numerous constraints in service. The shape and condition of the formwork surfaces define the final shape and condition of the concrete, after hardening and stripping.

Lors de l'opération de décoffrage, les surfaces coffrantes sont écartées pour libérer le béton. Si le béton adhère aux surfaces coffrantes, son état de surface et même son intégrité risquent d'être dégradés. Pour faciliter le décoffrage, il est donc important que les surfaces coffrantes présentent un état de surface aussi lisse que possible, dénué d'aspérités. Néanmoins, l'usure des surfaces coffrantes augmente au cours du temps. Ainsi, pour faciliter plus encore le décoffrage, il est connu d'enduire les surfaces coffrantes avec de l'huile ou agent de décoffrage avant de couler le béton dans l'enceinte.During the formwork operation, the formwork surfaces are separated to release the concrete. If the concrete adheres to the formwork surfaces, its surface condition and even its integrity may be degraded. To facilitate formwork, it is therefore important that the formwork surfaces have as smooth a surface condition as possible, devoid of any roughness. However, the wear of the formwork surfaces increases over time. Thus, to further facilitate the formwork, it is known to coat the formwork surfaces with oil or formwork agent before pouring the concrete into the enclosure.

Cependant, les huiles ou agents de décoffrage couramment utilisées sont nocives pour les ouvriers et polluent les sols au voisinage du chantier de construction. Les ouvriers doivent être équipés de protections spécifiques, tel qu'un masque respiratoire, des lunettes et une combinaison de protection, qui ne sont pas toujours utilisés malgré les risques et les coûts correspondants. L'huile ou agent de décoffrage doit être appliquée entre chaque opération de coffrage, ce qui prend un certain temps et demande une attention particulière. Si cette étape est réalisée trop rapidement, de l'huile ou agent de décoffrage risque de couler au sol, ce qui constitue à la fois un gaspillage, et une source de pollution pour les sols et les nappes phréatiques. En outre, certaines parties des surfaces coffrantes risquent de ne pas être recouvertes d'huile ou agent de décoffrage, et donc d'adhérer au béton. Dans le cas d'une construction en béton armé, si de l'huile ou agent de décoffrage est accidentellement appliquée sur les armatures métalliques, l'adhérence entre le béton et les armatures est fortement réduite et l'intégrité du matériau de construction risque d'être dégradée. GB 460 980 décrit une doublure pour coffrage comprenant au moins une feuille de caoutchouc, dont l'une des surfaces est ondulée, rugueuse ou autrement confère à la surface du béton ou autre matériau avec lequel il est employé le contour souhaité, et qui peut être facilement enlevée du béton sans difficulté après usage.However, commonly used oils or form release agents are harmful to workers and pollute the soil in the vicinity of the construction site. Workers must be equipped with specific protections, such as a respiratory mask, goggles and a protective suit, which are not always used despite the corresponding risks and costs. Oil or form release agent should be applied between each formwork operation, which takes some time and requires special attention. If this step is carried out too quickly, oil or form release agent may leak to the ground, which is both a waste and a source of pollution for soils and groundwater. In addition, some parts of the shuttering surfaces may not be covered with oil or form release agent, and therefore adhere to the concrete. In the case of reinforced concrete construction, if oil or form release agent is accidentally applied to metal reinforcement, the adhesion between concrete and reinforcement is greatly reduced and the integrity of the building material may be degraded. GB 460 980 describes a formwork lining comprising at least one sheet of rubber, one of the surfaces of which is corrugated, rough or otherwise gives the surface of the concrete or other material with which it is used the desired contour, and which can be easily removed from the concrete without difficulty after use.

JPH 111 9913 A décrit une feuille appliquée sur une surface de coffrage qui ne nécessite que peu d'efforts de nettoyage et permet un désolidarisation facile des éléments, comprenant une feuille avant constituée d'un matériau plastique ou en caoutchouc souple, et d'une feuille arrière faite avec une substance en caoutchouc magnétique ou en plastique magnétique qui se fixe magnétiquement sur une partie métallique de la surface de coffrage. La feuille avant est responsable d'un très bon état de surface pour la pièce en béton coulée. JPH 111 9913 A describes a sheet applied to a formwork surface which requires little cleaning effort and allows easy separation of the elements, comprising a front sheet made of a plastic or flexible rubber material, and a back sheet made with a magnetic rubber or magnetic plastic substance which magnetically attaches to a metal part of the formwork surface. The front sheet is responsible for a very good surface condition for the cast concrete part.

Le but de la présente invention est de remédier aux inconvénients ci-dessus.The object of the present invention is to remedy the above drawbacks.

A cet effet, l'invention a pour objet une feuille pour la protection d'une surface de coffrage, destinée à délimiter un volume de coulée de béton et à encadrer un matériau de construction, caractérisée en ce que la feuille comprend au moins : une couche avant, incluant au moins un matériau polymère et prévue pour être au contact du béton afin de réduire l'usure et la formation de rayures sur la surface de coffrage et de limiter l'adhésion du béton lors du décoffrage ; et une couche adhésive arrière, prévue pour être positionnée contre la surface de coffrage et solidariser la feuille à la surface de coffrage, avant l'amenée du matériau de construction.To this end, the subject of the invention is a sheet for protecting a formwork surface, intended to delimit a volume of concrete pouring and to frame a building material, characterized in that the sheet comprises at least: front layer, including at least one polymeric material and intended to be in contact with concrete in order to reduce wear and the formation of scratches on the formwork surface and to limit the adhesion of the concrete during formwork removal; and a rear adhesive layer, intended to be positioned against the formwork surface and to secure the sheet to the formwork surface, before the construction material is supplied.

Ainsi, l'invention permet de faciliter le décoffrage du matériau de construction, tout en évitant l'utilisation d'huiles ou agents de décoffrage nocifs et polluants. L'état de surface final du matériau est amélioré. Les ouvriers n'ont plus besoin d'équipements de protection contraignants. Les sols du chantier et des alentours ne sont plus pollués par les huiles ou agents de coffrage. La feuille peut être rapidement appliquée sur la surface de coffrage. La même feuille peut être réutilisée pour plusieurs opérations de coffrage successives, par exemple cinq opérations de suite, en restant installée sur la même surface coffrante, ce qui représente un gain de temps et donc d'argent conséquent. De plus, la même feuille résiste au contact du matériau de construction pendant plusieurs jours dans des conditions de chantier (humidité, ensoleillement, abrasion, ...). Un nettoyage rapide (grattage léger avec spatule, éponge abrasive ou chiffon) suffit pour nettoyer la feuille entre deux opérations de coffrage, de manière rapide et pratique en comparaison avec une séquence de nettoyage, grattage et huilage de la surface coffrante. Comme le matériau de construction n'est plus en contact direct avec les surfaces coffrantes, l'invention permet d'éviter une usure prématurée du coffrage, d'améliorer sa durée de vie, et donc de réaliser des économies. La feuille facilite l'écoulement de tout type de béton. Dans le cas d'une construction en béton armé, le risque d'appliquer accidentellement de l'huile ou agent de décoffrage sur les armatures métalliques est supprimé. Dans le cas d'un coffrage métallique, il n'est plus nécessaire de laver intégralement les surfaces coffrantes à très haute pression et de les poncer après un chantier, ce qui représente un gain de temps additionnel lors du stockage des banches et améliore encore leur durée de vie. Dans le cas de différentes tailles de banches, plusieurs feuilles peuvent être utilisées afin de couvrir entièrement la surface de coffrage.Thus, the invention makes it possible to facilitate the formwork removal from the building material, while avoiding the use of harmful and polluting oils or formwork release agents. The final surface condition of the material is improved. Workers no longer need restrictive protective equipment. The site and surrounding soils are no longer polluted by oils or formwork agents. The sheet can be quickly applied to the formwork surface. The same sheet can be reused for several successive shuttering operations, for example five operations in succession, while remaining installed on the same shuttering surface, which saves time and therefore considerable money. In addition, the same sheet resists contact with the building material for several days under site conditions (humidity, sunshine, abrasion, ...). A quick cleaning (light scraping with spatula, abrasive sponge or cloth) is enough to clean the sheet between two formwork operations, quickly and conveniently compared to a sequence of cleaning, scraping and oiling the formwork surface. As the construction material is no longer in direct contact with the formwork surfaces, the invention makes it possible to avoid premature wear of the formwork, to improve its service life, and therefore to save money. The sheet facilitates the flow of all types of concrete. In the case of reinforced concrete construction, the risk of accidentally applying oil or form release agent to metal reinforcement is eliminated. In the case of a metal formwork, it is no longer necessary to wash the formwork surfaces completely at very high pressure and to sand them after a site, which represents an additional time saving during the storage of the formwork and further improves their lifetime. In the case of different formwork sizes, several sheets can be used to fully cover the formwork surface.

Selon d'autres caractéristiques avantageuses de l'invention, prises isolément ou en combinaison :

  • La feuille comprend également une couche témoin d'usure disposée contre la couche avant, du côté de la couche adhésive arrière.
  • La couche témoin d'usure inclut au moins un matériau polymère et a une couleur différente de la couche avant.
  • La feuille comprend également : une couche intermédiaire, incluant au moins un matériau polymère ou un autre matériau et disposée contre la couche adhésive ; et une couche témoin d'usure interposée entre la couche avant et la couche intermédiaire.
  • La couche adhésive est constituée par un film adhésif double face ou un volume de colle.
  • La feuille comprend au moins un additif intégré à au moins une couche incluant au moins un matériau polymère, par exemple des pigments métalliques, un additif anti-UVs, un additif élastifiant, un additif rigidifiant, un additif de résistance à la chaleur et/ou un additif antistatique.
  • La feuille comporte au moins un trou traversant, pré-percé pour recevoir une clé de maintien.
According to other advantageous characteristics of the invention, taken individually or in combination:
  • The sheet also includes a wear indicator layer disposed against the front layer, on the side of the rear adhesive layer.
  • The wear indicator layer includes at least one polymeric material and has a different color from the front layer.
  • The sheet also includes: an intermediate layer, including at least one polymeric material or another material and disposed against the adhesive layer; and a wear indicator layer interposed between the front layer and the intermediate layer.
  • The adhesive layer consists of a double-sided adhesive film or a volume of glue.
  • The sheet comprises at least one additive integrated into at least one layer including at least one polymeric material, for example metallic pigments, an anti-UV additive, an elastifying additive, a stiffening additive, a heat resistance additive and / or an antistatic additive.
  • The sheet has at least one through hole, pre-drilled to receive a holding key.

L'invention concerne également une installation de coffrage équipée avec au moins une feuille telle que mentionnée ci-dessus. L'installation peut être verticale, notamment pour réaliser un mur, et comporter deux surfaces coffrantes disposées en regard. Dans ce cas, l'installation est de préférence équipée d'au moins deux feuilles disposées en regard et délimitant un volume de coffrage du matériau de construction. L'installation peut être horizontale, notamment pour réaliser un sol ou un plafond, et comporter une unique surface coffrante disposée en dessous du volume de coffrage. En fonction des dimensions de l'installation de coffrage, celle-ci peut comporter plusieurs feuilles positionnées sur chaque surface coffrante, délimitant le volume de coffrage. Dans ce cas, les feuilles voisines peuvent être reliées entre elles par des bandes de ruban adhésif, ou tout autre moyen adapté.The invention also relates to a formwork installation equipped with at least one sheet as mentioned above. The installation can be vertical, in particular for making a wall, and include two shuttering surfaces arranged facing each other. In this case, the installation is preferably equipped with at least two sheets arranged opposite and delimiting a formwork volume of the construction material. The installation can be horizontal, in particular for making a floor or a ceiling, and include a single formwork surface arranged below the formwork volume. Depending on the dimensions of the formwork installation, it may include several sheets positioned on each formwork surface, delimiting the formwork volume. In this case, the neighboring sheets can be connected together by strips of adhesive tape, or any other suitable means.

L'invention a également pour objet un procédé de fabrication d'une feuille telle que mentionnée ci-dessus. Le procédé de mise en œuvre est caractérisé en ce qu'il comprend au moins les étapes suivantes :

  • a1) fabriquer la couche avant, de préférence par extrusion ;
  • a2) appliquer la couche adhésive arrière, notamment par lamination ou enduction, pour former la feuille.
The invention also relates to a method of manufacturing a sheet as mentioned above. The implementation process is characterized in that it comprises at least the following steps:
  • a1) fabricating the front layer, preferably by extrusion;
  • a2) apply the back adhesive layer, in particular by lamination or coating, to form the sheet.

De préférence, la couche avant est en matière plastique. Si la feuille comprend plusieurs couches en matière plastique, ces couches peuvent être fabriquées simultanément lors de l'étape a1), en particulier par extrusion multicouche.Preferably, the front layer is made of plastic. If the sheet comprises several plastic layers, these layers can be produced simultaneously during step a1), in particular by multilayer extrusion.

Dans l'étape a2), la couche adhésive peut être constituée par un film adhésif double face (de préférence appliqué par lamination) ou un volume de colle (de préférence appliquée par enduction).In step a2), the adhesive layer may consist of a double-sided adhesive film (preferably applied by lamination) or a volume of glue (preferably applied by coating).

Généralement, l'étape a2) est réalisée après l'étape a1). Autrement dit, la couche adhésive arrière peut être appliquée sur la couche plastique avant, ou sur une autre couche plastique intermédiaire, après la fabrication de l'au moins une couche plastique.Generally, step a2) is carried out after step a1). In other words, the rear adhesive layer can be applied to the front plastic layer, or to another intermediate plastic layer, after the manufacture of the at least one plastic layer.

En alternative, l'étape a2) est réalisée simultanément à l'étape a1). Autrement dit, la couche adhésive arrière peut être appliquée sur la couche plastique avant, ou sur une autre couche plastique intermédiaire, pendant la fabrication de l'au moins une couche plastique. Par exemple, la couche adhésive peut être appliquée en ligne pendant l'extrusion.Alternatively, step a2) is carried out simultaneously with step a1). In other words, the rear adhesive layer can be applied to the front plastic layer, or to another intermediate plastic layer, during the manufacture of the at least one plastic layer. For example, the adhesive layer can be applied in-line during extrusion.

L'invention a également pour objet un procédé de mise en œuvre d'une feuille telle que mentionnée ci-dessus. Le procédé de mise en œuvre est caractérisé en ce qu'il comprend au moins les étapes suivantes :

  • b1) positionner la couche adhésive arrière contre la surface de coffrage, de manière à solidariser la feuille à la surface de coffrage, avant l'amenée du matériau de construction ; et
  • b2) réaliser le coffrage en amenant le matériau de construction au contact de la couche avant.
The invention also relates to a method of implementing a sheet as mentioned above. The implementation process is characterized in that it comprises at least the following steps:
  • b1) positioning the rear adhesive layer against the formwork surface, so as to secure the sheet to the formwork surface, before supplying the building material; and
  • b2) form the formwork by bringing the building material into contact with the front layer.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple non limitatif et faite en référence aux dessins annexés sur lesquels :

  • la figure 1 est une vue en perspective d'une installation de coffrage, comprenant deux banches pourvues de surfaces de coffrage ;
  • la figure 2 est une vue analogue à la figure 1, les surfaces de coffrage étant équipées d'un ensemble de feuilles de protection conformes à l'invention ;
  • la figure 3 est une vue de face des feuilles de protection de la figure 2 ;
  • la figure 4 est une vue de côté d'une feuille de protection, selon la flèche IV à la figure 3 ; et
  • la figure 5 est une vue analogue à la figure 4, montrant une feuille de protection conforme à un deuxième mode de réalisation de l'invention ; et
  • la figure 6 est une vue analogue à la figure 4, montrant une feuille de protection conforme à un troisième mode de réalisation de l'invention.
The invention will be better understood on reading the description which follows, given solely by way of nonlimiting example and made with reference to the appended drawings in which:
  • the figure 1 is a perspective view of a formwork installation, comprising two forms provided with formwork surfaces;
  • the figure 2 is a view analogous to the figure 1 , the formwork surfaces being equipped with a set of protective sheets according to the invention;
  • the figure 3 is a front view of the protective sheets of the figure 2 ;
  • the figure 4 is a side view of a protective sheet, according to arrow IV on the figure 3 ; and
  • the figure 5 is a view analogous to the figure 4 , showing a protective sheet according to a second embodiment of the invention; and
  • the figure 6 is a view analogous to the figure 4 , showing a protective sheet according to a third embodiment of the invention.

Sur les figures 1 et 2 est représentée une installation de coffrage 1. La figure 1 montre l'installation 1 dépourvue de feuilles de protection 10 conformes à l'invention. La figure 2 montre l'installation 1 conforme à l'invention, pourvue de feuilles de protection 10.On the Figures 1 and 2 a formwork installation 1 is shown. figure 1 shows the installation 1 devoid of protective sheets 10 according to the invention. The figure 2 shows the installation 1 according to the invention, provided with protective sheets 10.

L'installation 1 comprend deux banches 2 disposées en regard, un portique de manutention 3, des barrières de protection 4 et des contrefiches de soutien 5. Les banches 2 sont également appelées panneaux coffrants. Les banches 2 sont munies de surfaces de coffrage 6, ou surfaces coffrantes 6, disposées en regard et délimitant un volume 8 de coulée de béton. Le portique ou compas 3 est prévu pour stabiliser les banches 2 lors du coffrage et permettre leur levage en vis-à-vis lors du décoffrage. Les barrières 4 sont disposées en partie supérieure des banches 2, pour éviter la chute accidentelle d'un opérateur. Les contrefiches 5 sont disposées sur l'arrière des banches 2 pour rigidifier l'ensemble, notamment lors de la coulée de béton dans le volume 8. L'installation 1 peut comporter d'autres dispositifs, non représentés dans un but de simplification.The installation 1 comprises two forms 2 arranged opposite, a handling gantry 3, protective barriers 4 and support struts 5. The forms 2 are also called shuttering panels. The forms 2 are provided with formwork surfaces 6, or formwork surfaces 6, arranged facing each other and delimiting a volume 8 of concrete pouring. The gantry or compass 3 is provided to stabilize the formwork 2 during the formwork and allow their lifting vis-à-vis during the formwork. The barriers 4 are arranged in the upper part of the forms 2, to avoid the accidental fall of an operator. The struts 5 are arranged on the rear of the forms 2 to stiffen the assembly, in particular during the pouring of concrete into the volume 8. The installation 1 may include other devices, not shown for the purpose of simplification.

Comme montré aux figures 2 et 3, du fait de leurs dimensions, les surfaces coffrantes 6 sont pourvues de plusieurs feuilles de protection 10 conformes à l'invention. Les feuilles 10 sont disposées côte à côte, avec des bandes 16 de ruban adhésif disposées entre elles. Ensemble, les feuilles 10 et les bandes 16 forment une couverture de protection 18 appliquée sur une même surface 6.As shown to figures 2 and 3 , due to their dimensions, the formwork surfaces 6 are provided with several protective sheets 10 according to the invention. The sheets 10 are arranged side by side, with strips 16 of adhesive tape arranged between them. Together, the sheets 10 and the strips 16 form a protective cover 18 applied to the same surface 6.

La feuille 10 présente une forme globalement rectangulaire délimitée par un bord supérieur 11, un bord inférieur 12, un bord gauche 13 et un bord droit 14. Les bandes 16 sont positionnées sur la surface 6 pour recouvrir en partie le bord droit 14 d'une première feuille 10 et le bord gauche 13 d'une seconde feuille 10 voisine, de sorte que la couverture 18 recouvre complètement la surface 6. En effet, si certaines parties de la surface 6 ne sont pas recouvertes, deux problèmes risquent de survenir. Premièrement, du béton pourrait s'introduire entre la surface 6 et la feuille 10 lors de la coulée. Deuxièmement, le béton pourrait adhérer à la surface 6 lors du décoffrage. A titre d'exemple, les bandes 16 peuvent être formées par un film adhésif de jointage en polypropylène acrylique. Selon une variante possible mais non préférée, les feuilles 10 peuvent se chevaucher sans bandes 16 interposées entre elles.The sheet 10 has a generally rectangular shape delimited by an upper edge 11, a lower edge 12, a left edge 13 and a right edge 14. The strips 16 are positioned on the surface 6 to partially cover the right edge 14 of a first sheet 10 and the left edge 13 of a neighboring second sheet 10, so that the cover 18 completely covers the surface 6. In fact, if certain parts of the surface 6 are not covered, two problems may arise. First, concrete could be introduced between the surface 6 and the sheet 10 during casting. Second, the concrete could adhere to surface 6 during formwork removal. By way of example, the strips 16 can be formed by an adhesive adhesive film of acrylic polypropylene. According to a possible but not preferred variant, the sheets 10 can overlap without strips 16 interposed between them.

La feuille 10 présente une hauteur H10 définie verticalement entre ses bords 11 et 12, une largeur L10 définie horizontalement entre ses bords 13 et 14, et une épaisseur e10 définie horizontalement entre une face avant 22 et une face arrière 54. A titre d'exemples non limitatifs, la hauteur H10 est de l'ordre de 2800 mm (millimètres), la largeur L10 est de l'ordre de 625 mm et l'épaisseur e10 de l'ordre de 0,8 mm. De préférence, l'épaisseur e10 de la feuille 10 est supérieure à 0,2 mm et inférieure à 2 mm. En variante, l'épaisseur e10 peut être inférieure à 0,2 mm ou supérieure à 2 mm. Les bandes 16 présentent une largeur L16, par exemple de l'ordre de 38 mm. L'ensemble présente une largeur L18, par exemple de l'ordre de 4000 mm, correspondant à la largeur de la surface coffrante 3.The sheet 10 has a height H10 defined vertically between its edges 11 and 12, a width L10 defined horizontally between its edges 13 and 14, and a thickness e10 defined horizontally between a front face 22 and a rear face 54. As examples nonlimiting, the height H10 is of the order of 2800 mm (millimeters), the width L10 is of the order of 625 mm and the thickness e10 of the order of 0.8 mm. Preferably, the thickness e10 of the sheet 10 is greater than 0.2 mm and less than 2 mm. As a variant, the thickness e10 can be less than 0.2 mm or more than 2 mm. The strips 16 have a width L16, for example of the order of 38 mm. The assembly has a width L18, for example of the order of 4000 mm, corresponding to the width of the formwork surface 3.

La feuille 10 est conçue pour protéger efficacement la surface coffrante 6, destinée à encadrer le matériau de construction. La feuille 10 comprend différentes couches 20, 30, 40 et 50, qui ont des épaisseurs respectives e20, e30, e40 et e50. Les couches 20, 30 et 40 sont réalisées à base de matériau polymère, comportant éventuellement des charges, plastifiants et additifs. Autrement dit, les couches 20, 30 et 40 comprennent au moins un matériau polymère. De préférence, les couches 20, 30 et 40 sont en matière plastique. La couche 20 est la couche avant ou couche externe de la feuille 10. Les couches 30 et 40 sont les couches intermédiaires de la feuille 10. La couche 50 est la couche arrière ou couche interne de la feuille 10, réalisée en matériau adhésif. A titre l'exemple, les épaisseurs e20, e30 et e40 sont de l'ordre de 0,27 mm, tandis que l'épaisseur e50 est de l'ordre de 0,02 mm.The sheet 10 is designed to effectively protect the formwork surface 6, intended to frame the building material. The sheet 10 comprises different layers 20, 30, 40 and 50, which have respective thicknesses e20, e30, e40 and e50. The layers 20, 30 and 40 are made from a polymer material, optionally comprising fillers, plasticizers and additives. In other words, the layers 20, 30 and 40 comprise at least one polymeric material. Preferably, the layers 20, 30 and 40 are made of plastic. The layer 20 is the front layer or outer layer of the sheet 10. The layers 30 and 40 are the intermediate layers of the sheet 10. The layer 50 is the back layer or inner layer of the sheet 10, made of adhesive material. By way of example, the thicknesses e20, e30 and e40 are of the order of 0.27 mm, while the thickness e50 is of the order of 0.02 mm.

Les couches 20, 30, 40 et 50 présentent différentes faces planes liées entre elles. La couche 20 présente une face avant 22 et une face arrière 24. La couche 30 présente une face avant 32 et une face arrière 34. La couche 40 présente une face avant 42 et une face arrière 44. La couche 50 présente une face avant 52 et une face arrière 54. La face 24 est solidarisée à la face 32, la face 34 est solidarisée à la face 42 et la face 44 est solidarisée à la face 52. La liaison intime entre les couches 20, 30 et 40 est réalisée lors de leur fabrication, tandis que la liaison entre les couches 40 et 50 est réalisée lorsque la couche 50 est appliquée sur la couche 40, notamment par lamination ou enduction.The layers 20, 30, 40 and 50 have different planar faces linked together. The layer 20 has a front face 22 and a rear face 24. The layer 30 has a front face 32 and a rear face 34. The layer 40 has a front face 42 and a rear face 44. The layer 50 has a front face 52 and a rear face 54. The face 24 is secured to the face 32, the face 34 is secured to the face 42 and the face 44 is secured to the face 52. The intimate connection between the layers 20, 30 and 40 is made during of their manufacture, while the connection between the layers 40 and 50 is carried out when the layer 50 is applied to the layer 40, in particular by lamination or coating.

Les couches 20, 30 et 40 peuvent être en polypropylène, en polyéthylène, en polystyrène, en PVC, en résine, en composite de différents polymères et/ou autres matériaux, en matière plastique d'origine végétale ou toutes autres matières adaptées à l'application visée. De préférence, les couches 20, 30 et 40 sont fabriquées ensemble lors d'une même opération d'extrusion. De préférence également, la feuille 10 est fabriquée au format individuel, et non sous forme d'un rouleau à découper. Les dimensions de la feuille 10 ou d'une série de feuilles 10 peuvent être facilement adaptées aux dimensions de la surface 6 à protéger.The layers 20, 30 and 40 can be made of polypropylene, polyethylene, polystyrene, PVC, resin, composite of different polymers and / or other materials, plastic material of plant origin or any other material suitable for intended application. Preferably, the layers 20, 30 and 40 are produced together during the same extrusion operation. Preferably also, the sheet 10 is produced in individual format, and not in the form of a cutting roll. The dimensions of the sheet 10 or of a series of sheets 10 can be easily adapted to the dimensions of the surface 6 to be protected.

La couche 20 est prévue pour être disposée au contact du matériau de construction, à l'opposé de la surface 6, lors d'une opération de coffrage. Sur l'exemple des figures 2 et 3, les faces avant 22 des différentes feuilles 10 et celles des bandes 16 bordent le béton coulé dans le volume 8. La couche 20 est conçue pour avoir un effet amortisseur lors de la coulée du béton, afin de réduire l'usure et la formation de rayures sur la surface 6. La couche 20 est également conçue pour limiter l'adhésion du béton lors du décoffrage.The layer 20 is intended to be placed in contact with the building material, opposite the surface 6, during a formwork operation. On the example of figures 2 and 3 , the front faces 22 of the different sheets 10 and those of the strips 16 border the concrete poured into the volume 8. The layer 20 is designed to have a damping effect when the concrete is poured, in order to reduce wear and the formation of stripes on surface 6. Layer 20 is also designed to limit the adhesion of concrete during formwork.

La couche 30 est une couche témoin d'usure, réalisée avec une couleur différente des couches 20 et 40, ou au moins différente de la couche 20. La couche 30 assure une fonction de témoin d'usure : après plusieurs utilisations de la feuille 10, la face avant 32 de la couche 30 apparait lorsque la couche 20 est usée ou rayée. L'usure de la feuille 10 peut donc être détectée visuellement par les ouvriers, après un certain nombre d'utilisations, par exemple après quatre ou cinq coffrages successifs. En alternative, la fonction témoin de la couche 30 peut être réalisée par tout moyen adapté à l'application visée, autre qu'une différence de couleur.Layer 30 is a wear indicator layer, produced with a different color from layers 20 and 40, or at least different from layer 20. Layer 30 provides a wear indicator function: after several uses of the sheet 10 , the front face 32 of the layer 30 appears when the layer 20 is worn or scratched. The wear of the sheet 10 can therefore be detected visually by the workers, after a certain number of uses, for example after four or five successive forms. Alternatively, the control function of the layer 30 can be achieved by any means suitable for the intended application, other than a color difference.

La couche 40 est conçue pour faciliter l'adhésion de la couche 50 sur la face 44, par exemple par ajout d'un additif spécifique et/ou par texturage de la face 44 à l'aide d'un ou plusieurs rouleaux métalliques texturés. Dans ce cas, les rouleaux viennent appuyer sur la face 44 lors de l'extrusion ou après l'extrusion. Les couches 30 et/ou 40 peuvent être conçues pour rigidifier ou assouplir légèrement la feuille 10, en fonction du choix des matières plastiques et des épaisseurs e30 et e40.The layer 40 is designed to facilitate the adhesion of the layer 50 to the face 44, for example by adding a specific additive and / or by texturing the face 44 using one or more textured metal rollers. In this case, the rollers press on the face 44 during the extrusion or after the extrusion. The layers 30 and / or 40 can be designed to stiffen or slightly soften the sheet 10, depending on the choice of plastics and thicknesses e30 and e40.

Par ailleurs, différents additifs peuvent être utilisés dans la composition des couches plastiques 20, 30 et 40, afin de modifier les propriétés de la feuille 10. Par exemple, les couches plastiques (de préférence seulement la couche 40) peuvent intégrer des pigments métalliques pour améliorer le pouvoir magnétique des aimants, lors de la pose de mannequins de forme ou de gabarits au niveau de l'installation de coffrage. Selon un autre exemple, les couches plastiques (de préférence seulement la couche 20 et/ou la couche 40) peuvent comporter un additif de protection contre les UVs (ultraviolets), permettant d'améliorer la résistance de la feuille 10 aux UVs, notamment lors de son stockage. Selon un autre exemple, les couches plastiques (de préférence seulement la couche 20) peuvent comporter un additif élastifiant, pour augmenter leur élasticité et donc leur capacité d'absorption des chocs. Selon un autre exemple, les couches plastiques (de préférence seulement la couche 20) peuvent comporter un additif rigidifiant, pour contrôler leur dureté. Selon un autre exemple, les couches plastiques peuvent comporter un additif pour limiter leur déformation sous l'effet de changements de température, en particulier lors du coffrage ou lors du stockage. Selon un autre exemple, les couches plastiques peuvent comporter un additif antistatique.Furthermore, different additives can be used in the composition of the plastic layers 20, 30 and 40, in order to modify the properties of the sheet 10. For example, the plastic layers (preferably only the layer 40) can incorporate metallic pigments for improve the magnetic power of the magnets, when fitting form dummies or templates at the formwork installation. According to another example, the plastic layers (preferably only the layer 20 and / or the layer 40) can comprise an additive for protection against UVs (ultraviolet), making it possible to improve the resistance of the sheet 10 to UVs, in particular during of its storage. According to another example, the plastic layers (preferably only the layer 20) may comprise an elastifying additive, to increase their elasticity and therefore their capacity for absorbing shocks. According to another example, the plastic layers (preferably only the layer 20) may include a stiffening additive, to control their hardness. According to another example, the plastic layers may include an additive to limit their deformation under the effect of temperature changes, in particular during formwork or during storage. According to another example, the plastic layers can comprise an antistatic additive.

La couche adhésive 50 est prévue pour être positionnée contre la surface 6, pour solidariser la feuille 10 à la surface 6, avant l'amenée du matériau de construction dans le volume 8 entre les banches 2, lors de l'opération de coffrage. Plus précisément, la face 54 est prévue pour adhérer à la surface 6. La couche 50 peut se présenter comme un film adhésif double face, ou un volume de colle appliquée sur la couche 40 par enduction. La couche 50 est conçue pour rester accrochée à la couche 40 lorsque la feuille 10 est décollée de la surface 6. En d'autres termes, la face 52 reste accrochée à la face 44 lorsque la face 54 est décollée de la surface 6. De préférence également, la couche 50 s'étend sur l'ensemble de la feuille 10, autrement dit sur toute la face 44 de la couche 40. En alternative, la couche 50 s'étend partiellement sur la feuille 10, autrement dit sur seulement une partie de la couche 40. De préférence, la couche 50 est appliquée sur la couche 40 après l'extrusion des couches 20, 30 et 40. En alternative, la couche 50 peut être appliquée en ligne pendant l'opération d'extrusion. Avantageusement, lors de la fabrication de la feuille 10, la face 54 de la couche 50 peut être recouverte d'un film protecteur pourvu d'une languette.The adhesive layer 50 is intended to be positioned against the surface 6, to secure the sheet 10 to the surface 6, before the construction material is brought into the volume 8 between the forms 2, during the shuttering operation. More specifically, the face 54 is provided to adhere to the surface 6. The layer 50 can be presented as a film double-sided adhesive, or a volume of glue applied to layer 40 by coating. The layer 50 is designed to remain attached to the layer 40 when the sheet 10 is detached from the surface 6. In other words, the face 52 remains attached to the face 44 when the face 54 is detached from the surface 6. De preferably also, the layer 50 extends over the entire sheet 10, in other words over the entire face 44 of the layer 40. Alternatively, the layer 50 extends partially over the sheet 10, in other words over only one part of the layer 40. Preferably, the layer 50 is applied to the layer 40 after the extrusion of the layers 20, 30 and 40. Alternatively, the layer 50 can be applied in line during the extrusion operation. Advantageously, during the manufacture of the sheet 10, the face 54 of the layer 50 can be covered with a protective film provided with a tongue.

Sur l'exemple des figures 2 et 3, chacune des feuilles 10 comporte un trou central 60, traversant entre les faces 22 et 54. Les trous 60 sont prévus pour le passage de clés de maintien, c'est-à-dire des pièces transversales disposées dans le volume 8 pour soutenir les banches 2. Les trous 60 sont de préférence pré-percés lors de la fabrication de la feuille 10. En variante non représentée, une même feuille 10 peut comporter plusieurs trous 60.On the example of figures 2 and 3 , each of the sheets 10 has a central hole 60, crossing between the faces 22 and 54. The holes 60 are provided for the passage of holding keys, that is to say transverse pieces arranged in the volume 8 to support the formwork 2. The holes 60 are preferably pre-drilled during the manufacture of the sheet 10. In a variant not shown, the same sheet 10 may have several holes 60.

L'invention a également pour objet un procédé de fabrication d'une feuille 10. Le procédé comprend une étape a1) consistant à fabriquer les couches 20, 30 et 40, de préférence par extrusion. Le procédé comprend également une étape a2) consistant à appliquer la couche 50 sur la couche 40 pour former la feuille 10. Généralement, l'étape a2) est réalisée après l'étape a1). En alternative, l'étape a2) est réalisée simultanément à l'étape a1). Le procédé peut également comprendre une étape a3), consistant à marquer la feuille 10 avec un motif particulier, par exemple des formes, dessins, marques de commerce, logos ou toute autre création graphique. En particulier, le motif est marqué sur la couche 20, par exemple en passant la feuille 10 sous presse ou sous rouleau. Ainsi, le motif pourra être imprimé à la surface du béton lors de l'opération de coffrage.The invention also relates to a method for manufacturing a sheet 10. The method comprises a step a1) consisting in manufacturing the layers 20, 30 and 40, preferably by extrusion. The method also includes a step a2) of applying layer 50 on layer 40 to form the sheet 10. Generally, step a2) is carried out after step a1). Alternatively, step a2) is carried out simultaneously with step a1). The method can also include a step a3), consisting in marking the sheet 10 with a particular pattern, for example shapes, designs, trademarks, logos or any other graphic creation. In particular, the pattern is marked on the layer 20, for example by passing the sheet 10 through a press or under a roller. Thus, the pattern can be printed on the concrete surface during the formwork operation.

L'invention a également pour objet un procédé de mise en œuvre d'une feuille 10. Le procédé comprend une étape b1), consistant à positionner la couche 50 contre la surface 6, de manière à solidariser la feuille 10 et la surface 6, avant la coulée du béton. Le procédé comprend ensuite une étape b2), consistant à réaliser le coffrage en coulant le béton au contact de la couche 20. Le procédé comprend également une étape de décoffrage b3), réalisée après l'étape b2), consistant à décoffrer le béton ayant sa forme finale. Le procédé peut comprend une étape b0), réalisée avant l'étape b1), consistant à pré-percer le trou traversant 60 et/ou découper les bords 11, 12, 13 et 14 de la feuille 10 en fonction des dimensions de la surface 6. Le procédé peut également comprendre une étape b4), réalisée entre les étapes b1) et b2), consistant à positionner des bandes de jointage 16 entre des feuilles 10 voisines. Le procédé peut également comprendre d'autres étapes préparatoires avant l'étape de coffrage b2), ainsi que d'autres étapes après les étapes b2) et b3).The subject of the invention is also a method of implementing a sheet 10. The method comprises a step b1), consisting in positioning the layer 50 against the surface 6, so as to secure the sheet 10 and the surface 6, before pouring concrete. The method then comprises a step b2), consisting in carrying out the formwork by pouring the concrete in contact with the layer 20. The method also comprises a formwork removal step b3), carried out after step b2), consisting in removing the concrete having its final form. The method may include a step b0), carried out before step b1), consisting in pre-drilling the through hole 60 and / or cutting the edges 11, 12, 13 and 14 of the sheet 10 according to the dimensions of the surface 6. The method may also include a step b4), carried out between steps b1) and b2), consisting in positioning jointing strips 16 between adjacent sheets 10. The process can also include other preparatory steps before the shuttering step b2), as well as other steps after steps b2) and b3).

Dans le cadre de l'invention, le matériau de construction utilisé pour le coffrage peut être du béton ou tout autre matériau adapté à l'application visée. L'opération de coffrage permet de construire des murs, des planchers ou tout autre type d'éléments, par exemple des barrières, des canalisations ou des carreaux en béton.In the context of the invention, the construction material used for the formwork can be concrete or any other material suitable for the intended application. The formwork operation makes it possible to build walls, floors or any other type of element, for example barriers, pipes or concrete tiles.

D'autres modes de réalisation de l'invention sont décrits ci-après en référence aux figures 5 et 6. Dans ces modes de réalisation, les éléments constitutifs de la feuille 10 sont comparables à ceux du premier mode de réalisation décrit plus haut et, dans un but de simplification, portent les mêmes références numériques.Other embodiments of the invention are described below with reference to Figures 5 and 6 . In these embodiments, the constituent elements of the sheet 10 are comparable to those of the first embodiment described above and, for the purpose of simplification, bear the same reference numbers.

Sur la figure 5, la feuille 10 comprend une couche plastique avant 20, une couche témoin 30 et une couche adhésive 50, mais pas de couche plastique intermédiaire 40. La couche adhésive 50 est appliquée sur la couche témoin 30.On the figure 5 , the sheet 10 comprises a front plastic layer 20, a control layer 30 and an adhesive layer 50, but no intermediate plastic layer 40. The adhesive layer 50 is applied to the control layer 30.

Sur la figure 6, la feuille 10 comprend une couche plastique avant 20 et une couche adhésive 50. Dans ce mode de réalisation simplifié, la couche adhésive 50 est appliquée sur la couche plastique 20On the figure 6 , the sheet 10 comprises a plastic layer before 20 and an adhesive layer 50. In this simplified embodiment, the adhesive layer 50 is applied to the plastic layer 20

Par ailleurs, la feuille 10 peut être conformée différemment des figures 2 à 6 sans sortir du cadre de l'invention. En particulier, la feuille 10 peut présenter des formes et des dimensions différentes en fonction de l'application visée.Furthermore, the sheet 10 can be shaped differently from figures 2 to 6 without departing from the scope of the invention. In particular, the sheet 10 may have different shapes and dimensions depending on the intended application.

Sur l'exemple des figures 1 et 2, les surfaces coffrantes 6 sont verticales et sensiblement planes. En variante non représentée, une surface coffrante peut être horizontale ou inclinée. Selon une autre variante, une surface coffrante peut être concave ou convexe, et non plane.On the example of Figures 1 and 2 , the shuttering surfaces 6 are vertical and substantially planar. In a variant not shown, a formwork surface can be horizontal or inclined. According to another variant, a formwork surface can be concave or convex, and not planar.

Selon une autre variante non représentée, la feuille 10 peut être thermoformée pour lui donner une configuration particulière adaptée à l'application visée. Une grande variété de formes du matériau de construction peut ainsi être obtenue après coffrage.According to another variant not shown, the sheet 10 can be thermoformed to give it a particular configuration adapted to the intended application. A wide variety of shapes of the building material can thus be obtained after formwork.

Quel que soit le mode de réalisation, la feuille 10 comprend au moins : une couche plastique avant 20, incluant au moins un matériau polymère et prévue pour être au contact du matériau de construction ; et une couche adhésive arrière 50, prévue pour être positionnée contre la surface de coffrage 6 et solidariser la feuille 10 à la surface de coffrage 6, avant l'amenée du matériau de construction.Whatever the embodiment, the sheet 10 comprises at least: a plastic layer before 20, including at least one polymeric material and intended to be in contact with the building material; and a rear adhesive layer 50, intended to be positioned against the formwork surface 6 and to secure the sheet 10 to the formwork surface 6, before the construction material is supplied.

En outre, les caractéristiques techniques des différents modes de réalisation et variantes mentionnés ci-dessus peuvent être, en totalité ou pour certaines d'entre elles, combinées entre elles. Ainsi, la feuille 10 peut être adaptée en termes de coût et de performance.In addition, the technical characteristics of the various embodiments and variants mentioned above may be, in whole or for some of them, combined together. Thus, the sheet 10 can be adapted in terms of cost and performance.

Claims (11)

  1. A sheet (10) for protecting a formwork surface (6), the formwork surface (6) being intended to define a concrete casting volume and to surround a construction material, the building material being concrete in volume (8) characterized in that the sheet (10) comprises at least:
    - a front layer (20), including at least one polymer material and provided to be in contact with the concrete so as to reduce wear and the formation of grooves on the formwork surface (6) and to limit adhesion of the concrete during removal of the formwork; and
    - a rear adhesive layer (50), provided to be positioned against the formwork surface (6) and to secure the sheet (10) to the formwork surface (6), before the concrete is introduced.
  2. The sheet (10) according to claim 1, characterized in that it also comprises a wear indicator layer (30) positioned against the front layer (20), on the side of the rear adhesive layer (50).
  3. The sheet (10) according to claim 2, characterized in that the wear indicator layer (30) includes at least one polymer material and has a different color from the front layer (20, 40).
  4. The sheet (10) according to one of the preceding claims, characterized in that it also comprises:
    - an intermediate layer (40), including at least one polymer material or another material and positioned against the adhesive layer (50); and
    - a wear indicator layer (30) inserted between the front layer (20) and the intermediate layer (40).
  5. The sheet (10) according to one of the preceding claims, characterized in that the adhesive layer (50) is made up of a double-sided adhesive film or a volume of glue.
  6. The sheet (10) according to one of the preceding claims, characterized in that it comprises at least one additive integrated into at least one layer (20, 30, 40) including at least one polymer material, for example metal pigments, an anti-UV additive, an elasticator additive, a stiffening additive, a heat resistance additive and/or an antistatic additive.
  7. The sheet (10) according to one of the preceding claims, characterized in that it includes at least one through hole (60), predrilled to receive a maintaining key.
  8. A formwork installation (1), characterized in that it is equipped with at least one sheet (10) according to claims 1 to 7.
  9. A method for producing a sheet (10) according to one of claims 1 to 7, characterized in that it comprises at least the following steps:
    a1) producing the front layer (20), preferably by extrusion;
    a2) applying the rear adhesive layer (50), in particular by lamination or coating, to form the sheet (10).
  10. A method for producing a sheet (10) according to claim 9, characterized in that the front layer (20) is manufactured by extrusion and in that the rear adhesive layer (50) is applied on-line during the extrusion.
  11. A method for using a sheet (10) according to one of claims 1 to 7, characterized in that it comprises at least the following steps:
    b1) positioning the rear adhesive layer (50) against the formwork surface (6), so as to secure the sheet (10) to the formwork surface (6), before introducing the concrete; and
    b2) producing the formwork by bringing the concrete into contact with the front layer (20).
EP15783989.5A 2014-10-17 2015-10-16 Sheet for protecting a formwork surface, formwork installation, method of production and method of use Active EP3206868B8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1460018A FR3027249B1 (en) 2014-10-17 2014-10-17 SHEET FOR THE PROTECTION OF A FORMWORK SURFACE, FORMWORK INSTALLATION, MANUFACTURING METHOD AND METHOD OF IMPLEMENTING THE SAME
PCT/EP2015/073959 WO2016059193A1 (en) 2014-10-17 2015-10-16 Sheet for protecting a formwork surface, formwork installation, method of production and method of use

Publications (3)

Publication Number Publication Date
EP3206868A1 EP3206868A1 (en) 2017-08-23
EP3206868B1 true EP3206868B1 (en) 2020-03-04
EP3206868B8 EP3206868B8 (en) 2020-06-24

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EP15783989.5A Active EP3206868B8 (en) 2014-10-17 2015-10-16 Sheet for protecting a formwork surface, formwork installation, method of production and method of use

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US (1) US20170247893A1 (en)
EP (1) EP3206868B8 (en)
AU (1) AU2015332666A1 (en)
ES (1) ES2777324T3 (en)
FR (1) FR3027249B1 (en)
WO (1) WO2016059193A1 (en)

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WO2021258313A1 (en) * 2020-06-24 2021-12-30 简单绿能股份有限公司 Preparation method for composite material capable of simultaneously dyeing and fitting forming

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Publication number Priority date Publication date Assignee Title
FR3077024B1 (en) * 2018-01-24 2020-09-11 Pro T Co SHEET FOR APPLYING A PREDEFINED PATTERN ON THE SURFACE OF A CONCRETE ELEMENT DURING ITS MANUFACTURING, SYSTEM AND METHOD USING THIS SHEET FOR THE MANUFACTURING OF A CONCRETE ELEMENT
FR3114335B1 (en) 2020-09-22 2022-11-11 Anoxa ELEMENT OF GUARDRAILS, IN PARTICULAR OF PANEL GUARDRAILS
NO346312B1 (en) * 2020-10-22 2022-05-30 Arnfinn Saervoll Point-loaded lifting fork for lifting standing formwork doors
CN114482542B (en) * 2022-01-14 2023-08-18 浙江荣大建设有限公司 Template surface cement clearing device for construction

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GB460980A (en) * 1935-08-12 1937-02-08 Rubber Producers Res Ass Improvements in and relating to shuttering and like moulds and formers
JPH1119913A (en) * 1997-07-01 1999-01-26 Denki Kagaku Kogyo Kk Composite sheet for manufacturing concrete product and manufacture of concrete product

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US3751790A (en) * 1970-10-05 1973-08-14 S Frazier Construction of a form for concrete molding
JPS61126002A (en) * 1984-11-22 1986-06-13 Showa Denko Kk Aquatic antifouling laminate
FR2644194A1 (en) * 1989-03-10 1990-09-14 Titel Gie Groupe Protective film intended for the temporary protection of rough surfaces
US6444311B1 (en) * 1999-10-19 2002-09-03 Saint-Gobain Performance Plastics Corporation Impact resistant protective multilayer film
DE20206254U1 (en) * 2002-04-19 2002-08-08 Wirz, Peter, 53721 Siegburg sealing tape
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GB460980A (en) * 1935-08-12 1937-02-08 Rubber Producers Res Ass Improvements in and relating to shuttering and like moulds and formers
JPH1119913A (en) * 1997-07-01 1999-01-26 Denki Kagaku Kogyo Kk Composite sheet for manufacturing concrete product and manufacture of concrete product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021258313A1 (en) * 2020-06-24 2021-12-30 简单绿能股份有限公司 Preparation method for composite material capable of simultaneously dyeing and fitting forming

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ES2777324T3 (en) 2020-08-04
EP3206868A1 (en) 2017-08-23
EP3206868B8 (en) 2020-06-24
FR3027249B1 (en) 2018-03-09
AU2015332666A1 (en) 2017-05-04
FR3027249A1 (en) 2016-04-22
WO2016059193A1 (en) 2016-04-21
US20170247893A1 (en) 2017-08-31

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